Scientists at UC San Francisco have detected 109 chemicals in a study of pregnant women, including 55 chemicals never before reported in people and 42 “mystery chemicals,” whose sources and uses are unknown. The chemicals most likely come from consumer products or other industrial sources. They were found both in the blood of pregnant women, as well as their newborn children, suggesting they are traveling through the mother’s placenta. The study will be published March 17, 2021, in Environmental Science & Technology. “These chemicals have probably been in people for quite some time, but our technology is now helping us to identify more of them,” said Tracey J. Woodruff, Ph.D., a professor of obstetrics, gynecology and reproductive sciences at UCSF.
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